Chemistry Isotopes Solution: The element antimony has an atomic weight of 121.7...

Solution: The element antimony has an atomic weight of 121.757 amu and only two naturally occurring isotopes. One isotope has an abundance of 57.3% and an isotopic mass of 120.904 amu. What is the mass of the other isotope? A) 52.479 amu B) 121.757 amu C) 122.393 amu D) 122.610 amu E) 122.902 amu